What is the answer to 12+7x-21=-8(3-x)+4x ?

The answer to 12+7x-21=-8(3-x)+4x is x=3

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12+7x-21=-8(3-x)+4x

12 + 7 x - 21 = - 8 (3 - x) + 4 x

x = 3

Solution steps

12 + 7 x - 21 = - 8 (3 - x) + 4 x

Group like terms

7 x + 12 - 21 = - 8 (3 - x) + 4 x

Add/Subtract the numbers:

12 - 21 = - 9

7 x - 9 = - 8 (3 - x) + 4 x

Expand

- 8 (3 - x) : - 24 + 8 x

7 x - 9 = - 24 + 8 x + 4 x

Add similar elements:

8 x + 4 x = 12 x

7 x - 9 = - 24 + 12 x

Move

9

to the right side

7 x = 12 x - 15

Move

12 x

to the left side

- 5 x = - 15

Divide both sides by

- 5

x = 3

25 x^{2} - 64

4 y^{2} + 28 y - 72

2 x^{2} - 512 = 0

\frac{10 - x}{2} = \frac{x + 1}{3}

(8) = - 1 (5) + b

What is the answer to 12+7x-21=-8(3-x)+4x ?
The answer to 12+7x-21=-8(3-x)+4x is x=3
Solve for x: 12+7x-21=-8(3-x)+4x
The solution is x=3